Scanning

Module Structure

A sample configuration for running, visualizing, recording, and exporting scans with the DVL-5000 is available on the iniVation release server. A screenshot of the structure is shown below.

Module Descriptions

Module	Description
DV Undistort	Undistortion of captured events.
DVL Laser Profiler	Extraction of laser line from events and mapping of extracted laser line into 3D space.
DVL Point Cloud Renderer	Rendering of extracted profiles on a 2D graph.
DVL Running Heat Map	Rendering of extracted profiles in a running heat map.
DVL Latency Measurement	Measuring latency between captured events and computed point cloud.
DVL Point Cloud CSV Output	CSV export of point cloud data.

Module Configuration

Module	Configuration
DV Undistort	Set the camera calibration path.
DVL Laser Profiler	The output unit can be chosen between physical units (in mm) and pixel. If physical is selected, the profiler calibration path needs to be set.
DVL Point Cloud Renderer	No configuration necessary.
DVL Running Heat Map	Select the data range which should be displayed (in the same units as selected for the profiler). A subsampling rate may be chosen if needed.
DVL Latency Measurement	No configuration necessary.
DVL Point Cloud CSV Output	Set the path to the output file.

Running the DVL-5000

1. Open DV.
2. Select Connect to → Remote runtime and enter the IP address of the DVL-5000. The port is 4040.
   1. If the DVL-5000 is connected to a DNS, you can enter dvl-5000 instead of the IP address.
3. Open the DV configurations downloaded from the release site: .tar.gz or .zip.
   1. Select File → Open project and select the path to the folder to which you extracted the downloaded archive containing the DV configurations.
   2. Select the DV configuration named dvl-5000-camera-capture.xml.
4. In the profiler's calibration options, select between pixel and physical for the output type.
5. Start the desired modules, and switch to the Output tab in DV.

The DVL-5000 should be running now. If it is not running, enable the DVL-5000 by checking the box "Enable signal generator" under the external input configuration.

The figure below shows a sample output of the DVL Running Heat Map module.

Notes for Obtaining the Best Possible Results

• Always undistort the events using the dv-undistort module.
• Focus the lens using a Siemens Star.
  • Try to get a good depth of focus by reducing the aperture, but make sure that the laser line is still visible.
• Focus the laser to the region of interest.
• The bias settings in the DVXplorer module have an impact on the quality of the extracted laser line.
  • If the object to be scanned is very close to the DVL-5000, lower bias settings tend to yield better results.
  • If the object to be scanned is farther away from the DVL-5000, higher bias settings tend to yield better results.
• If possible, ensure that the measurement range covers the entire image range.